Yes. I use troops whenever I can, as opposed to acting a cowardly genocidal spoiled brat dictator maniac who thinks his spare time is worth more than the lives of billions of civillians.
Besides, it gives me the perfect justification to wage war against people who don't. As SJ points out, it can be a huge savings and gain in time and resources, from a purely pragmatic view. And, all I have to do is not go to -50% and I get a huge advantage taking planets from munchkins who think troops are useless. Probably because all your subjects would really rather serve in my empire, because you are a cowardly genocidal...
PvK